Tag That Photo - Your Photos in Your Control by Tag That Photo Software. Face Recognition, Privacy, Tagging and more.
Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
digiKam - Professional Photo Management with the Power of Open Source
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.